This feature requires the webRequest.filterResponseData() API, currently only available in Firefox. HTML filtering is the ability to filter the response body of HTML documents before it is parsed by the browser.įor example, this allows the removal of specific tags in HTML documents before they are parsed and executed by the browser, something not possible in a reliable manner in other browsers. On the Web" at Asia Pacific Network Information Centre, August 2020. Source: "Characterizing CNAME Cloaking-Based Tracking The dark green/red bars are uBO before/after it gained ability to uncloak CNAMEs on Firefox. The effect of this is to make uBO on Firefox the most efficient at blocking 3rd-party trackers relative to other other browser/blocker pairs: CNAME-uncloakingĪbility to uncloak 3rd-party servers disguised as 1st-party through the use of CNAME record. This document explains why uBO works best in Firefox. Read carefully if using uBO/webext on legacy Firefox.The removed element reappears when you reload the page.Software known to have uninstalled uBlock Origin.Doesn't uBlock Origin add overhead to page load?.Does uBlock Origin block ads or just hide them?.
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